public async Task <IActionResult> Captcha()
{
string captchaCode = ImageFactory.CreateCode(LoginVM.CAPTCHA_CODE_LENGTH);
await HttpContext.Session.LoadAsync();
HttpContext.Session.SetString(CAPTCHA, captchaCode);
using var stream = ImageFactory.BuildImage(captchaCode, 50, 100, 20, 3);
return(Ok("data:image/jpeg; base64, " + Convert.ToBase64String(stream.ToArray())));
}
static void Main(string[] args)
{
using (FileStream fs = File.OpenWrite("d:/1.jpg"))
using (Stream picStream = ImageFactory.BuildImage("AB123", 50, 100, 20, 10, ImageFormatType.Jpeg))
{
picStream.CopyTo(fs);
}
Console.ReadKey();
}
public IActionResult GetValidCode()
{
string res = "";
string code = ValidCodeHelper.CreateVerifyCode(out res);
TempData[ConstList.LOGINSESSION] = res;
Stream stream = ImageFactory.BuildImage(code, 40, 120, 12, 2, ImageFormatType.Jpeg);
return(File(stream, "image/jpeg"));
}
public IActionResult CreateCaptCha()
{
Random rd = new Random();
string code = rd.Next(1000, 9999).ToString();
TempData["CaptCha"] = code;
Stream picstream = ImageFactory.BuildImage(code, 50, 100, 20, 10);
return(File(picstream, "image/png"));
}
static void Main(string[] args)
{
string code = ImageFactory.CreateCode(5);
using (FileStream fs = File.OpenWrite("d:/1.jpg"))
using (Stream picStream = ImageFactory.BuildImage(code, 50, 100, 20, 10))
{
picStream.CopyTo(fs);
}
//Console.ReadKey();
}
public IActionResult CreateCaptCha()
{
Random rand = new Random();
string code = rand.Next(1000, 9999).ToString();
TempData["CaptCha"] = code;
//.net core 2.0的System.Drawing只有几个简单的类，不全面
//还要 https://www.nuget.org/packages/CoreCompat.System.Drawing.v2
Stream picStream = ImageFactory.BuildImage(code, 50, 100, 20, 10);
return(File(picStream, "image/png"));
}
public static async Task SendCaptchaAsync(SocketUser u)
{
string captchaCode = ImageFactory.CreateCode(6);
await Task.Yield();
Task save = verificationDatabase.Captcha.SetCaptchaAsync(captchaCode, u);
MemoryStream imageStream = ImageFactory.BuildImage(captchaCode, 60, 160, 24, 14);
imageStream.Position = 0;
Image image = Image.FromStream(imageStream);
image.Save($"{u.Id}.png", ImageFormat.Png);
await Task.WhenAll
(
save,
u.SendFileAsync($"{u.Id}.png", $"Please type `\\verify` followed by a space and this captcha code to continue{((u as SocketGuildUser) != null ? $" to {(u as SocketGuildUser)!.Guild.Name}" : "")}.\n")
);
image.Dispose();
File.Delete($"{u.Id}.png");
List <Task> commands = new();
foreach (SocketGuild g in u.MutualGuilds)
{
if (await verificationDatabase.Roles.GetVerificationRoleAsync(g) == null)
{
continue;
}
SocketGuildUser user = g.GetUser(u.Id);
commands.Add(SendToCaptchaLog.SendToCaptchaLogAsync(SendToCaptchaLog.CaptchaType.Requested, user, captchaCode));
}
await Task.WhenAll(commands);
}
